This notebook was used by Absalom M. Kennedy in March 1917 for notes on experimental work for the U.S. Navy performed under the direction of Edison during World War I. The book, which has been used in both directions, consists primarily of notes on experiments involving amplifiers, audion circuits, transmitters, and transmitter parts. At the other end are a few pages containing descriptions and drawings of transmitters, numbered E1-E6 and E31. Several entries include notations by Edison or remarks by Kennedy about his opinions and suggestions. The notes indicate that E. Rowland Dawson and Joe Meilner also worked on these experiments. Two items, including a note in Edison's hand, have been inserted into the book. The front cover is labeled "Experiments. #2 March 6 - March 20." The pages are unnumbered. Approximately 110 pages have been used.